The view from the top of the mountain at the Phurea National Park in north-east Thailand

The view from the top of the mountain at the Phurea National Park in north-east Thailand in June 2016

Sign at the Phurea National Park in north-east Thailand. Slippery route

Sign at the Phurea National Park in north-east Thailand in June 2016. Slippery route

Using a smart phone as a GPS on the road to Phurea National Park in north-east Thailand

Using a smart phone as a GPS on the road to Phurea National Park in north-east Thailand in June 2016

A pickup truck on the road to Phurea National Park in north-east Thailand in June 2016

A pickup truck on the road to Phurea National Park in north-east Thailand in June 2016

Pretty scenery on the road to Phurea National Park in north-east Thailand

Pretty scenery on the road to Phurea National Park in north-east Thailand in June 2016

An e-tan farm vehicle on the road to Phurea National Park in north-east Thailand

An e-tan farm vehicle on the road to Phurea National Park in north-east Thailand in June 2016

Telecommunication towers on the road to Phurea National Park in north-east Thailand

Telecommunication towers on the road to Phurea National Park in north-east Thailand in June 2016

Scenery on the road to Phurea National Park in north east Thailand

Scenery on the road to Phurea National Park in north east Thailand in June 2016

A Thai post sign on Phu Rea mountain in Loei Province, Thailand. The coldest place in Siam

A Thai post sign on  Phu Rea mountain in Loei Province, Thailand in June 2016. The coldest place in Siam

Lucky charms for sale at a gift shop on Phu Rea mountain in Loei Province, Thailand

Lucky charms for sale at a gift shop on Phu Rea mountain in Loei Province, Thailand in June 2016

Rules to be observed on Phu Rea mountain in Loei Province, Thailand. I like the keep quiet one!

Rules to be observed on Phu Rea mountain in Loei Province, Thailand in June 2016. I like the keep quiet one!

A faded sign on Phu Rea mountain in Loei Province, Thailand

A faded sign on Phu Rea mountain in Loei Province, Thailand in June 2016

A tree seed on Phu Rea mountain in Loei Province, Thailand

A tree seed on  Phu Rea mountain in Loei Province, Thailand in June 2016

An orchid on Phu Rea mountain in Loei Province, Thailand

An orchid on Phu Rea mountain in Loei Province, Thailand in June 2016

A Buddha image at the top of the Phu Rea mountain in Loei Province, Thailand

A Buddha image at the top of the Phu Rea mountain in Loei Province, Thailand in June 2016

The view from the top of the Phu Rea mountain in Loei Province, Thailand

The view from the top of the Phu Rea mountain in Loei Province, Thailand in June 2016